System for testing and recording the condition of clock setting circuits



c. w. JANSON ET AL 1,881,622

SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIRCUITS Oct. 11, 1932.

Filed Feb. 5, 1950 6 Sheets-Sheet l 3maentors; 6 '77. Jansow W]? C aZZahm- Oct. 11, 1932. s. w. JANSON ET AL- b 8 5 SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIRCUITS Filed Feb. 5. 1930 6 Sheets-Sheet 2 'Gttorneg Oct. 11, 1932. e. w. JANSON ET AL SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIRCUITS Filed Feb. 5. 1950 6 Sheets-Sheet 3 Inwcntors:

G. WiJanso WIT C'aZZaha/n/ a Littorneg Oct. 11, 1932. e. w. JANSON ET AL SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIR CUITS 6 Sheets-Sheet 4 Filed Feb. 5'. 1950 170 j8 J69 m7 fWJanson WITCaZ mm Oct. 11, 1932. G. w. JANSON ET AL 1,381,622

SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIRCUITS Filed Feb. 5. 1930 s Sheets-Sheet 5 1 1932- s. w. JANSON ET AL 1,881,622

SYSTEM FOR TESTING AND RECORDING THE CONDITION OF CLOCK SETTING CIRC UITS Filed Feb. 5, 1930 6 Sheets-Sheet 6 31wentors.-.

Gfwfanoon I CaZZahan T fir wif wf 323 1?, w f i wiifii 1% a3 w m 3 m w w a w m m m wfl ml gm Gttomeg Patented Get. 11, 1932 PATENT fGFFICE GEORGE w, JANSON, E N-UTLEYQ-NEWJEESEY, AND, WILLIAM F. CALLAHAN, or

Senora-1:13am; NEW ORK} Assronons "ro THE WESTERN 'UNION TELEGRAPH com- PANY,QF NEW YOR an, A CORIEOBATION OF NEW YORK SYSTEM EOE irmrIirG-AnnREcoRnnteirHE GONDITION or CLOCK SETTING CIRCUIT-S Application filed February 5, 1930. Serial No. 426,169.

.flfhishfithtim relates to apparatus for testingand' registering circuit conditions.

It jisfyery important, in many instances, that electric circuits'should be constantly in condition to trans nit current impulses and itfi's equally"important;where a numberof circuits lead from-a central station and are intendedffor frequent use; that the condition of such circuits should be ascertained at close 10,

timefintervalsso tha-t'correction of improper conditions preventing the" transmission of currentma y made without delay. For instance, it quite c'ommon to'control a multiplicity of clocks by electrical means from,

accntral station WllQlBlHlS a master clock keeping very accurate time',this master clock controlling a plurality-of circuits each of which'con'trols one or more individual electrical clock controlling mechanisnis'located at'remo'te points, such clocks being generally leased tosubscribers It is essential that the circuits betweenthefmaster clock and the local 'clocl'zs should remain in proper condition. It has been customary to have anemloyeeco'nnect a testing instrument to such c rcuits in succession and for him to note tl se circuits which are not n proper 'condition. This requ res the constant attention .of one or more eni'ployeesu It is uncertain sfinc'e'the' employee may 'accidentlyor otherwise, omit to test some of the circuits. It depends on the employees noting the circuit whichis Odt'Of order and is here again sub-.

jest to error. sivef YThe main objects of the present invention are to provide an efiioientautomatic appara- Finally it isslow and expentus which willtest the circuits of a's'eries in succession; to cause such apparatus to make a printedrecord'; to cause such apparatus to automatically record the ending of-each seriesof tests to arrange the apparatus so'that thecircuits to be tested may for testing purposes be dividedinto sets jeae11 including'a comparatively small number; to 'cause the apparatus t o, a utomati c ally record the termination of the tests of'each set; to provide a'novel arrangement of motor means for op- Y crating the apparatus; to prov'ide means-for D'J.

closing a circuit tl'irough the motorat spac'ed time intervals; to provide means for holding the circuit through. the motor until all of the circuits have been tested to provide novel means for feeding a recording tape and inking ribbon through the printing recording mechanism; vand to provide means for causing the motor circuit to open and all current to be cut off until the time for the next series of tests.

With the above and other objects in view one embodiment of the invention will now be described in detail and specifically claimed, reference being had to'the accom panying drawings wherein: l

Figure 1 is a perspective view-of the apparatus;

Figure 2 is a fragmentary detail view showing the action of the printing solenoid and type wheel;

Figure 3 is a perspective view from the right side and rear of the apparatus with certain parts omitted and others broken away to show the construction;

Figure 4c is a vertical section substantially on the median plane from front to rear of the apparatus;

Figure 5 is a bottom view of the type wheel or gear;

' Figure 6 is a section on the line 6-6 of Figure 4;

Figure 7 is a view similar to Figure 6 but showing the parts in other positions;

Figure 8 is a section on the line 8-'8 of Figure 6;

' Figure 9 is a section on the line 99 -0 Figure 7;

Figure 10 is a detail section on the line 1010 of Figure 9; and

Figure 11 is a wiring diagram of the ap paratus.

Mounted upon a suitable table or base 10 is a front plate 11 and a rear plate 12 extending vertically in parallel spaced relation. Between these plates or standards extends a frame 13 which supports a-casing 14, (see Fig. 3). Below this casing islocated the driving motor 15, the shaft of which carries a-gear 16; meshing'with-a gear 17 on ahorizonta-l shaft 18 suitably journalled to extend through th'e casing 14;. A WOIm 19 carried tical shaft 26, supported by bearings 27, se' cured in the top and bottom of the casing'14;

Fixed on'ith'e'shaft 26 .is'a pinioni 28 which drives a large gear 29 keyed on=the shaft 22.

Thus the motor drives the shaft 22 through a "reducing tram; "Also revolub'ly mounted on the shaft 22 is a sleeve 30, whichis suitably journalled in the top of the casing" 14. Pinnedto the lower end of this sleeve is .a

large; gean 31 which meshes with and isdriven by. apinion32 fixed on the shaft 26. Itwill henoted that the pinion28 is larger than the.

pinion 32 and that, correspondingly, the gear 29 is smaller than the gear 31. By this means the .shaft 22 is ca used to revolve somewhat morelrapidl y than the sleeve-3O for the purpose hereinafter described. Surrounding the sleeve is a cup shapedsupport 33 and on the upper edgeofthis support is rotatably mounted a hollow cylindrical sleeve or panel 34. In the lower part of the inner faceof this cylindrical panel 34 is a spiral series of contacts35 each-connected to a binding post 36 which projects through the wall of the panel and carries on its outer end the scour ingand binding nuts 37, (seeFig. 3). By means of these posts and nuts the conductors 38 of the respective circuits to be tested are connected individually to the respective contacts 35.- Ithasbeen mentioned that these contacts are arranged in a spiral on the inside of the cylindrical panel 34 and it will be noted that each convolution of thespiral con tains an equal number of contacts 35 and that thereare several convolutions, the corresponding contacts in successive convolu-.

tions being vertically alined. Thus the entire series of contacts are divided into sets For instance,.in the construction shown in Figure 3, six convolutions or sets are shown, while in;,the wiring diagram, Fig. 11, there is illustrated four sets of twenty contacts each, the remaining sets being omitted to avoid coniplication. The conductors 38 connected to the contacts are carried in cables 39 which pass downwardly through a conduit 40 and each conductor extending through a circuit .3; including one or more clocks or other translatingdevices to ground 41 at the distant end.

Slidably mounted on the shaft 22 but arrangedito iIOlZELlZG therewith is an insualting sleeve 42, the upper part of the shaft 22 being squared as at; 43 and'the sleeve 42 having a square opening therethrough to fit the squared portion 43.. This sleeve carries an arm 44 which inturn-carries a spring contact 45 the-.free end ofwhich wipes over the contacts @135. Surrounding I this sleeve is a under face; beveled in conformity with, the

pitchla-ngle of the. spiral edge 47, and this lugrides on said edge. Both the shaft. 22 and the cam cylinder 46 rotate in an anticlockwise direction as the device'is seen'in plan but, as before stated, the shaft 22 revolvesfaster than the sleeve 30 which carries the cam cylinder 46. Therefore, as these two members rotate, the sleeve 42 is caused, not only to rotate but also to rise as it rotates. Thedifference in the speed of the rotating cam and the rotating sleeve is suchthat the spring contact 45 is caused to travel over the contacts 35 in a spiral path conforming to the locus of the centers of these contacts and thus to engage each one in succession. Ob-

viously when the lug 49 passes off the upper end of the cam edge 47 the sleeve 42 will drop to its initial position at the lower end of said cam edge, being thus ready to again carry the spring contact 45 over the contacts 35.

It should herefbe noted that the contact 45 I does not engage the first of the contacts 35 when thus dropped, but is in such'position contact of the set next above.

At the top of the shaft portion 43 is fixed an insulating sleeve 51 which carries a lower contact 52 and an upper contact 53, these contacts being similar to the contact 45 and insulated from each other. A flexible conductor 54 connects the contacts 45 and 52 and is of proper length to permit the complete ravel of the sleeve 42. The contact 52 travels over an annular series of contacts 55 and the contact 53 traverses a like series of contacts 56. These contacts are alined on the panel 34 above corresponding contacts 35 so that each time the movable contact 45 engages a contact 35, the movable contacts 52and 53 engage respective corresponding contacts 55 and 56. Obviously the sets of contacts 55 and 56 are each equal in number to a set of the contacts 35. At the end of the series of. contacts 55 and directly above the.

nsaneaa.

gages the contact 50, the movable contact 52' will engage the contact t57. Also, at the end ofkthe series of contacts 56, but closer to said purpose' ozt causing automatic operation of i the. apparatus there is-provided a clock 60. Power is provided for the operation of the Various: functions and for the operation of" the circuits 38 and of the motor from any suitable source of energy as indicated by the generator 61. The clock is providedwith a rotary cam member 64, driven by the clock Workto-revolve once in each selected time interval as, for instance, once each hour. A normally .open circuit-closer having a fixed number and a movable member 66 is positioned' with its movable member in the path of the cam 64 so that the circuit closer is closed once in each time interval. The member 65 is, connected by'a conductor 67 with one terminal of a battery 68, the other terminalof the battery being connected by a conductor 69 to one terminal of the winding of the starting magnet 70. The contact 66 is connected by a conductor 71 with the other terminal of said Winding. This magnet controls a conductor armature 72 normally engaging a fixed back contact 73 and moving under the influence of the magnet into engagement with the front contact 74. The contact 73 isconnected' by a conductor 7 5 with the generator main 63. The armature 72is connected by a conductor 76 with one terminal of the winding of a magnet 77' having its other terminal connected by a conductor '78 with the main 63. This magnet 77 is providedwith a conductive armature 79 from which extends a conductor 80' which leads to one terminal of a resistance 81 having its other terminal connected by a conductor 82 '1 with the conductor 76 and thus to the magnet 77. Upon energizaticn of this magnet 77 its armature is moved into engagement with its front contact 83, connected by a conductor 84 with the positive main 62. The contact 74 is connected by a conductor 85 with one terminal of a resistance 86, its other terminal being connected bv a conductor 87 with the conductor 84. One brush of the motor 15 is connected by a conductor 88 with one terminal of a resistance 89, the other terminal" being connected to the conductor 80. The other brush of the motor 15 is connected by'a' conductor 90 with the negative main 63.

3 Considering the operation of the circuits thus far described, it will be seen that upon each revolution of the circuit closing cam 64, a circuit, which may be termed the clock cir'- cuit, is closed from the battery 68, through conductor 67, contact 65, contact 66, conductor 71, magnet 70 and conductor 69, back to the battery. The magnet being thus energized Will cause engagement of its armature 72 with the con! act '74, closing a circuit which may be called the motor relay circuit, from the main 62 through conductor 84:, conductor 87, resistance 86, conductor 85, contact 74, armature 72, conductor 76, magnet 77 and conductor 78 to the negative main 63. This, in turn will energize the magnet 77 and close the motor circuit from the positive main 62 through conductor 84, contact 83, armature 79, conductor 80, resistance 89, conductor 88, motor 15 and conductor 90 to the negative main 63. At the same time a motor locking circuit will be established from the positive main 62 through conductor 84, conductor 83, armature 79, conductor 80, resistance 81, conductor 82, conductor 76, magnet 77 and conductor 7 8' to the ne ative main 63. This circuit will remain closed and the motor will operate until the armature 72 drops back against its back contact 73, at which time the motor relay closing circuit will be broken and the motor relay locking circuit will be shortcircuited through the conductor 76, armature 72, contact 7 3 and conductor 75 to the nega tive main 63, thus deenergizing the magnet 77 and opening the motor circuit at the contact 83.

Upon the closing of the motor circuit as previously described, a circuit for the locking magnet 91 will be established from the positive main 62 through conductor 84, contact 83, armature 79, conductor 80, resistance 93, conductor 92, magnet 91 and conductor 9 1 to the negative main 63. This circuit will hold the armature 72in contact with the contact 74 after the cam 64 has revolved sufficiently to permit opening of the clock circuit through the magnet 70.

The outside clock circuits to be tested are connected to the respective contacts 35 and are successively connected to the generator 61 through the test difierential relay 95. The resistance of the relay coils 95 and 95 may difier considerably and may have a value of 125 ohms and 200 ohms respectively. The outer terminal of coil 95 is connected in parallel to conductors 96, 97 and 99 which I are connected respectively to different contacts or groups of contacts 55. Suitable resistances 98 and 100 are inserted in these conductors in order to supply diilerent voltages 1 5 The outer terminal of the coil 95 is coni nected to ground at 105 through an artificial line which may include a resistance of say 900 ohms. The junction of the'inner ends of the coils or apex is connected through con- 'ductor 101, resistance 102, which may be 1000 ohms, resistance 103, conductor 80, armature 79, and conductor 84 to the generator main 62.

''through a conductor 107 to a fixed contact 108 in the pats of the armature 109 ofthe differential relay. From this armature a conductor 110 leads to one terminal of the prin ing solenoid 59, the other terminal of this solenoid being connected by conductor 111,

resistance 112, conductor 80, armature 79,

and conductor 84 to the positive generator main 62. If current flows through both of thesewindings the armature of relay 95 is not actuated. The relay 95be1ng wound difierential, the effect of the current flowing 1n winding 95 will neutralize the effect of the current flowing inwinding 95 butif current ceases to flow through winding 95 the armature will be moved away from the back contact under influence of the coil 95".

From the armature 109 a conductor 113 leads to one terminal of the winding of a magnet 114 having its other terminal con- 36 nected by a conductor 115 to the contact 50.

The magnet 114 is of opposite polarity to that of the locking magnet 91 and thus, when energized, neutralizes the effect of the magnet 91 on'the armature 72, causing the armature to fall back against its back contact 73.

In order that the printer solenoid shall have time to operate before the holding magnet 91 is neutralized by the field of the magnet 114, the winding of magnet 114 is shunted by a resistance 117 and shunted by a condenser 119 and resistance 121'. This occurs only at the close of the series of tests when the brush 45 engagesthe contact 50 and the brush 52 engages the contact 57 hrush 45, flexible conductor brush 52, contact 55 conductor 99, coil of the test dif-.

'ferential relay, conductor 101, resistance 103, conductor 80,, armature 79, and conductor 84 to generator main 62. If the circuit is inthe proper condition the current whi h flows from generator 61 divi es evenly at the apex liof the difi erential relay between the coils 95 The operation 05 the apparatus will be and 95 and consequently their efi'ect is neutralized: The armature 109 therefore is not actuated'but remains on the back contact. If the circuit-is'not in proper condition the solenoid 59 will actuate the printing mechanism to record the condition of the circuitgupon a tape or other suitable record, in a manner to be described. The contacts 56 are connected in multiple The motor will continue to operate and cause the brushes 45; 52,:an'd 53to advance from one contact tov the nextofthe set. After the first set of-contacts 35 ha've been covered, the bottom row'in-the diagram, the brushes move off of the last contacts of their respective sets'at the leftof the diagram;

and the brush 53 then engages'the contact 58;

A circuitfor the printer solenoidis'thus estab lished from positive generator main -62,"

through-conductor 84, armature 79, conduc tor 80, resistance .112, conductor-" 111, solenoid 59,.conductor' 1-22, contact S-and brusli 53 to ground at 123. The circuit through coil 95 of the difierential relay 95 is open at this time. printed on'the tape by the operation of the solenoid, such as the'equality sign indi of the shaft 22, the brush 52 willengage the contact 57 but as the brush 45 has been raised by the action of the cylindrical cam 46, the

brush 45 will not engage the contact 50 at this time and hence no circuit will be completed through conductor 115. The brush 45 will now advance to the first contact of the second set, the circuits connected thereto being tested as "before and the special character above referred to being printed at the endof each set. It will be noted that in passing from one contact35 to the next the circuit through the winding 95 will be broken and the differential relay will close at contact 108.-

If one of the circuits 38 being tested is faulty or otherwise'fails to transmit current, there will be no circuit established throughthe winding 95 upon the brush 45 engaging the corr spending contact 35 connected to the defective circuit. Consequently the armature 109 of the differential relay will be actuated and the circuit through the printer will be established between the contact 108 and the armature. It may here benoted that this printing circuit cannot ground 120 because of the presence of the, condenser 119. ,Since the printer operates for a. defective circuit under test; the number or {character,corresponding to ,that circuit'will be ,printed on the tape. For instance, if the ifourthcireuit of the set being testedis defective the numher 4 will show on the tape as followsz=4 etc.=.-"-Thus an inspect-ion of the tape will An arbitrary character is BOI only show on the tape the. numbers; corresponding to the. defective circuits; r

The. operations. above'described will continue until'all of. the contacts 35. have been engaged by the brush 45. At this time the cam lug; 49 will be near, the top of the cam cylinder 46. and just as the sha ft 22 completes its last revolution in causing the movement of the brush 45 over all the-testing cont-acts 35., the cam lug 49: will pass'oft the, spiral portion of the cam cylinder and thesleeve 42 will drop from: the top to the bottom of the spiral so that thebrush 45 will engage the contact 50.. At the. same time the brush 52 will engage the contact 57 thereby establishinga releasing circuit from the positive main 62 through conductor 84, contact 83,.arn1ature 79, conductor 80, resistance:112, conductor 111,. solenoid 59, conductor 11.0, conductor 1.13, magnet 114, conductor-115, contact. 50, brush 45, flexible conductor 54', brush 52 and contact 57. to ground at 124. The actuation of the printer solenoid causes another character to be recorded'upon' the tape to:indicate the completion of the test of the circuits connected to the contacts in each of the'set-s. This character is represented upon the tape as an asterisk. The record of a completetest ofall circuits is found on the record tapebetween-two successive asterisks. This record is divided into the groups or sets by an arbitrary character printed between the sets, int-his case, the equality sign The inspector can, therefore, determine from the tape record the particular circuit or-circuits' that are not in proper condition.

To insure the operation of the printer solenoid before the motor circuit is broken-by the armature 72, the complete energization of the neutralizing magnet 114 is retarded by connecting a resistance 117 across its terminals, shuntedby a condenser 119 and resistance 121. With this arrangement the magnetic field of the neutralizingmagnet cannot attain its full strength until after-the charge has been built up on the condenser 119. When this occurs thefield of the magnet 91 will be nullified and the armature'72 will drop back against its back stop 73, thus breaking the circuit of the motor cont-rolling magnet 77, causing its armature 79 to open the'circuit at contact 83 and stop the motor.

Provision is made for manually closingthe clock circuit so that the testsmay be conducted at any time without waiting for the circuit closing contact 66 to be engaged'by the cam 64. To this end there is provided a manually operable circuit closer 125 connected by conductors 126to the conductors 07' and 71. V

It is to-be noted that, in the embodiment here-shown there are six sets'of contacts '35 each containing twenty contacts. These contacts are spaced circumferentially from each other'on the-cylindrical panel 15 as are the contacts55 and 56'. .The contact 58is spaced 15 from thezlast contact 56 and the contacts 50 and; 57 are spaced 30, from the'cont'act 5.8 and consequently 30 from the first contact zof each set, there thus being twenty four spaces around the cylinder.

From F'gures 4 and'S it will be seen that the gear 29 meshes witha gear wheel 127. Figure 5 shows abottom plan view of; this :wheel and-it will there be seen thatlthis wheel carries raiseutype128, for the numbers from 1, to 201 and alsohaving as special characters the equal sign and an asterisk,(*). It will also be observed that these type are spaced in accordance. with the spacing of;

the contacts on the cylindrical panel as above .noted. The solenoid 59 is secured to the standard 11 immediately below'thiswheel 127, which projects through a slot in said standard, so that the solenoid plunger or core 129lies below and in alinenient withthe individual vtype corresponding to the position of the brushes 45, 52 and This-type wheel is carried on a. shaft 130 journalled in a bearing 131 on the rear face of the standard 11. Mounted on the table or base 10 is a pair of tape reels 132 and 133, the tape 134' being wound oflithe reel 132 and the reel 133 being usedfor storing the printed tape after it has passed through the machine.- On the stand- 1 ard 11 adjacent the reel 132 is a split guide pin 135' and spaced from the oppositeedge of the standard 11 is a similar guide pin-136. These two guide pins are so positioned that the tape is guided across the upper end of the is a gear 142 which is connected by idler gears 143 with the gear forming the type wheel 127. After leaving the feed wheel'137 the tape passes through a slot 144 in a brack et 145 and thence downwardly for winding on the reel 133- Pivoted on the standard 11 is a lever 146 carrying a presser wheel 14? by which the tape is kept in engagement with the feed wheel at all times.

Revolubly mounted on the front of the standard 11 are the ink ribbon reels 148 and 149. These reels are mounted on shafts-150 and 151 respectively andthese shafts extend through the standard 11 and project rearwardly thereof. The ink ribbon 152' is wound on these reels in the usual manner and is guided-byspaced guide rollers-153-to"pass between the tape 134 and the type wheel, thus lying just above said tape'and in spacedrelation thereto. Ont-he shafts 150 and 151 are "mounted respective gears 154 and 155. A shaft-156 is journalled to lie between the .lower parts of thegears 154 and l and on this shaft is-mounted a rocking plate 157.

p Also,- on the shaft 156 is'pivoted an arm 158 whereon is revolubly mounted a spaced pair of idlers 159 and 160 positioned for engagement with the gears 154 and 155 according to the position of the arm 158. Both of these .idlers mesh with a gear 161 mounted on the shaft 156 and this gear in turn,meshes with a gear 162 fixed on a shaft 163 carrying a star :wheel 164 the teeth of which on age .holes 165 formed in the upperface oi the type wheel 127..

- Pivotedat one end on the rear face of the standard 11 is a lever 166 which extends across the rear face of the rocking plate 157 at the upper end thereof and this lever is urged downwardly at its free end by a tension spring 167. On the under side ot'the lever 166 is formed a pair of bevel faced notches 168 so spaced that a pin 169 projecting rearwardly from the plate 157 may engage in one or the other of these notches accordingly as the plate is rocked in one direction or the other. This arrangement serves to hold the plate 157 in fully rocked position and prevents its stopping in an in- ;termediate position. The upper edge of the .plate 157 is shaped to form a cam 170 which en ages the end of a lever 171 to raise it as in igure 6 or permit it to drop as in Figure '7. The lever 171 is pivoted by a screw 172 .to the rear face of the standard 11 and carries a stirrup 173 which engages beneath a latch hook 174 pivoted as at 17 5- and urged downwardly by a spring 176. The hook 174 is positioned to engage 2. lug 177 on the upper end of arm 158, when the pinion 160 is moved into mesh with the gear 155. Projecting rearwardly from the upper end of the plate 157 are spaced pins 178 and 179 which engage respective sides of the arm 158 in accordance with the movement of the plate. A boss 180 projects from the rear of the arm 158. at the upper end thereof and rides under the V-shaped end of a leaf spring 181 so that, upon passing the center of the V-shaped end, the boss is forced away from said center, thus ensuring the proper meshing or" the small gears or pinions 159 and 160 with the gears 154 and 155. A sliding bar 182 is mounted for lateral sliding movement on the standard 11 and carries split guide pins 183 which project through slots in said standard and straddle the inking ribbon 152. This tape :is provided adjacent each end with a button .or eyelet184 too large to pass through the slot of the split pins 183. N otches or pockets 1185 are formed in the bar 182 and receive the ends of legs 186 projecting downwardly from the rocking plate "157 i I In the operation of this part of the device it maybeassumed that the parts are in the position shownin Figure 7. In this-position :the inking ribbon is being wound on the reel 148. As the ribbon is wound oii the reel 149, the button or eyelet l84 engages the splitfpin 183 at the leftot Figs. 6 and 7 and moves the bar 182 to thewright. The righthand leg 186 is atthis time in its notch 185, and the movement of the bar thus startsa rocking movement of the plate-157, which is continued by the engagement of the left hand leg 185 in its notch. Asthe rocking movement starts, the pin 169 camsthe Ilever 166 ,up-

wardly and passes outof the right notch 168 and enters the left notch- 168. The'sp'ring 167 draws the lever down,tl1us forcing the pin 169towards the bottom ofthe-left notch and ensuring proper movement of the plate .157.

Meanwhile, the pin 17,9 hasengaged the arm 158 and starred its-rocking movement to force the boss 180 past the spring 181.

As this boss passes the center of the spring,

the action of the latter on the bossisnapsthe arm to the left and thus causes engagement of the pinion 160 with the gear .155, so that the movement of the ink ribbon is reversed. Also the dropping of the lever171 by movementofthe plate 157 permits the hook 174 to I engage the lug 177 and locket-he arm 158 .in its new position, the parts now being-in the positions shown in Figure 7. When the button or eyelet at the remaining'end of the ink ribbon engages its split pin, the bar-.182"

moves to the left and the reverse action takes place, it being noted that the cam action of the plate 157 iifts'the lever 171 and'hook 174 to free the arm 1 8 for movement. P

The action or" the printing mechanism will 7 now be clear since each time a circuit is tested andis defective, the solenoid 59 isenergized, thus causing the solenoid core 129 to force the ink ribbon against a type character and the tape against the ink ribbon (see F conductive conditions in a series of electrical circuits, an electroanagnetically operated printing mechanism, a normally open circuit for said printing mechanism, means responsive to defective circuits operatingto close said open circuit, motor means for actuating the last mentioned means, a normally open motor circuit for said-motor means, and time controlled means for closing the motor circuit at predetermined time intervals. 8. In apparatus for testing and recording *conductiveconditions in a series of electricalxcircuits, ran electroemagnetically operclose said open circuit, motor'meansfor actuuating thelast mentioned means, a normally open motor circuit for said motor means,

tim'econtrolled means for closing the motor g :.C1I.Clllt at predetermmed time mtervalspand other means to automatically eiiect opening of the last of said series of circuits. Q 4. sln apparatus for testing andrecordmg 5:1 .said open circuit, and means independent of said-series of circuits for closing a circuit through the printing mechanism at spaced intervals in the series of tests.

:5;-In' apparatus for testing and recording (3 defective conductive conditions in a series of -:electrical circuits, a printer, electro-magne'tic means for operating the printer, a relay in- :cluding .ainormal'ly open circuit closer, a printer circuit connecting the circuit closer E23,) in series with the printer operating means,

msai cl relay including a winding controlling the closing of the circuit closer, and means for successively connecting each of the series ofcircuitsto said winding.

-5 6. In apparatus for testing and recording I defective conductive conditions in a series of electrical circuits, a printer, electro-mag 1 netic'printer operating means, a. relay in 2:1 conductiveconditions in a series of electrical eluding a normally open circuit closer, a se j-r'iesof contacts, electrical conductors coni :necting the contacts in multiple to the circuit closer andconnectingthe latter in series with the printer operating means, a brush traversing said series of contacts and ar- 11! A5 ranged to intermittently completea circuit through the printer operating means, and means to connect the circuits of said series "successively to said relay in unison with the engagement of the brush with respective ea contacts 5 eluding a normally open circuit c1oser,'a se- 1 ries of contacts, electrical conductors connecting' the-contacts in multiple to'the circuit closer and connecting the latter in series "withitthe printeroperatmg' means, a brush -traversing said :series of contacts and arranged to intermittently completea circuit 1 through the printer operating means,;1neans toizconnect the circuits of said series successivelyxto vsaid relay in. *unisoniWith-the engagement' er the brush with respective, conftaots, a further contact in the'path of said brush spaced from the last of said series of contacts, and a conductor connecting the last mentioned contact with said printer operating means to veli'ect operation of the printer independently of the circuit closer.

8. Inappara-tus for testing and recording conductive conditions in a series of electrical circuits, a printer, electro-magnetic printer operating means, a relay including a normally open circuit closer, a series of contacts, 1 cat the motor circuit subsequent to the testing electrical conductors connecting the contacts in multiple to the circuit closer and connecting the latter in series with the printer operating means, a brush traversing said series of contacts and arranged to intermittently complete a circuit through the printer operating means, a second series of contacts each having conductive connection With said relay, and'equal in number to. the first series of contacts, a set ofcontacts each connected to arespectiveexternal circuit to be tested and equal in number to the first series of contacts, abridge means for successively connecting respective contacts of the second series With corresponding contacts of the set, and means operating means, a relay including a normally open circuit closer, a series of contacts, electrical conductors connectlng. the contacts in multiple to the circuit closer and connecting the latter in series with the printer operating means. a brush traversing said series of contacts and arranged to intermittently complete a circuit through the printer operating means, a second series of contacts each having conductive connection with said relay, and equal in number to the first series of contacts, a set of contacts each connected to a ,respectlve external circuit to be tested and equal in number to the first series of contacts, bridge means for successively connecting respective contacts of the second series with corresponding contacts of the set, means for actuating the brush and bridge means in synchronism including a motor, a motor circuit, and time controlled means for efiecting closing of the motor circuit at predetermined time intervals.

10. In apparatus for testing and recording conductive conditions in a series of electrical circuits, a printer, electro-magnetic printer operating means, a relay including a normally open circuit closer, a series of contacts, electrical conductors connecting the contacts in multiple to the circuit closer and connecting the latter in series With the printer operating means, a brush traversing said series of contacts and arranged to intermittently completea clrcu t through the punter operating :means, asecond series of contactsea-ch arranged to cause the brushes to traverse said first and second series of contacts and a set of the third series of contacts in unison, said operating means being further arranged to effect repetition of movement of the first and second brushes and to cause the third'br'ush to traverse the several sets of contacts in the :third series succesively.

' llQ In apparatus for testing and recording conductive conditions in a series of electrical' circuits, a printer, electro-magnetic printer operating means, a relayincluding a normally open circuit closer, aserles of contacts, electrical conductors connecting the contacts in multiple to the circuit closer and connecting the latter in series With the printer operating means, a brush traversing said series of contacts and arranged to intermittentlycomplete a circuit through the printer operating means, a second series of contacts each having conductive connection with said relay, and equal in number to the first series of contacts, a third series of contacts each connected to a respective circuit to be tested,

said third series of contacts comprising a plurality of parallel sets of contacts, a second brush traversing the second series of contacts, a third brush traversing the third serie of contacts and electrically connected to the second brush, operating means for said brushes arranged to cause the brushes to traverse said first and second series of contacts and a set of the third series of contacts in unison, said operating means being further arranged to effect repetition of movement of the first and second brushes and to cause the third brush to traverse the several sets of contacts in the third series successively, a supplemental contact in the path of the first brush at the end of the first series of contacts and electrically connected to the printer operating means, and a pair of supplemental contacts bridged by the second and bird brushes upon completion of the travel of the third brush through the third series of contacts, said pair of contacts having electrical connection with the printer operating means.

12. In a circuit testing device for testing a series of main circuits, a series of contact terminals each having a respective main circuit connected thereto, said terminals being arranged in sets, a supplemental terminal at plemental' terminal and contact means successlvely engaging the mam circuit terminals, sa1d contact means being arranged to engage the supplemental terminal in passing from one set of main terminals to the next.

13. In a circuit testing device for testing a series of main circuits, a series'of contact terminals each having a respective-main circuit connected thereto,'said terminals being arranged in sets,asupplemental terminal at the ends of said sets of main terminals, a supplemental circuit connected to said suplemental terminal, contact means successivey engaging the'maincircuit terminals said contact means being arranged to engage the supplemental terminal in passing immune set of main terminals to the next, a final supplemental terminal at theend of said series, and a second supplemental circuit connected to said final terminal, said contact meansbee ing arranged. to engage the final terminal upon completion of its engagement with the final set of main terminals and after finalengagement with the first mentioned supplemental terminal. i

14. In apparatus for testing and recording circuit conditions in a series of circuits an electro-magnetically operated printer,'a normally open printing circuit therethrough, circuit closing means arranged for closing circuits successively through the seriesvof circuits to be tested and thereby intermittently closing said printing circuit, a motor driving sa1d circuit closing means, a normally-open, motor circuit, a relay for closing sa1d motor circuit and including an operating magnet,

time controlled means for temporarily closing a circuit through said magnet, a locking circuit for said relay operable to hold therelay closed upon opening of the time controlled circuit, and means controlled by said first circuit closing means for effecting short circuitiug of the locking circuit upon completion t the series of tests. I I V 15. In apparatus for testing and recording circuit conditions in a series of circuits, an electro-magnetically operated printer, a normally open printing circuit therethrough, circuit closing means arranged for closingcircuits successively through the series of circuits to be tested and thereby intermittently closing said printing circuit, a motor driving said circuit closing means, a normally open motor circuit, a relay for closing said motor circuit and including an operating magnet, a. normally open-circuited second relay'for closing a circuit through the first relay and including a circuit closing-magnet, a circuit through the second relay and including a normally open circuit closer, a clock'arranged to close the last mentioned circuit closen temporarily at spaced time intervals, a locking magnet in said second relay for holding the same closed, a normally open circuit for the locking magnet closed-by the closing of the first relay, a neutralizing magnet for the second relay arranged to neutralize the field of the locking magnet, a normally open circuit through said neutralizing magnet, and means controlled by the first circuit closing means for closing the neutralizing magnet circuit upon completion of the tests of the series of circuits to be tested.

16. In apparatus for testing and recording conductive conditions in a series of circuits, a recording device comprising a movable record tape, an inking ribbon associated with said tape, a rotatable type wheel bearing type characters each indicating a specific circuit, a printing solenoid positioned to cause engagement of the ribbon with a type character on the wheel and the tape with the ribbon upon energization thereof, a circuit closer arranged to successively close circuits through the series of circuits and thereby cause intermittent energization of said solenoid, a motor, and means operatively connecting the motor to the type wheel and to the circuit closer to operate the wheel and circuit closer in unison.

17 In apparatus for testing and recording conductive conditions in a series of circuits, a recording device comprising a movable record tape, an inking ribbon associated with said tape, a rotatable type wheel bearing type characters each indicating a specific circuit, a printing solenoid positioned to cause engagement of the ribbon with a type character on the wheel and the tape with the ribbon upon energization thereof, a circuit closer arranged to successively close circuits through the series of circuits and thereby cause intermittent energization of said solenoid, a' motor, means operatively connecting the motor to the type wheel and to the circuit closer to operate the wheel and circuit closer in unison, means to close a supplemental circuit through said solenoid after circuits have tures.

GEORGE W. JANSON. WILLIAM F. CALLAHAN.

been closed through all the circuits under test,

and a supplemental type character on said wheel positioned for printing upon closing of the supplemental circuit.

18. In apparatus for testing and recording conductive conditions in a series of circuits forming a plurality of sets, a recording device comprising a movable record tape, an inking ribbon associated with said tape, a rotatable type wheel bearing type characters each indicating a specific circuit, a printing solenoid positioned to cause engagement of the ribbon with a type character on the wheel and the tape with the ribbon upon energization thereof, a circuit closer arranged to successively close circuits through the series of circuits and thereby indicate defective circuits upon energization of said solenoid, a motor, means operatively connecting the motor to the type Wheel and to the circuit closer to operate the wheel and circuit closer in unison, means to close a supplemental circuit through said so- 

